After 15 days of investigation, India’s Defense Institute of Physiology and Allied Sciences concluded its study of 82-year-old yogi Prahlad Jani on Thursday, May 6.

Jani, who claims to have lived without food or water since his childhood, was under the close watch of three video cameras 24 hours a day. Researchers conducted various medical tests on him. The research team, consisting of 35 scientists, could not find any evidence that Jani ate or drank anything during the 15 days.

Doctors have not found any adverse effects in his body from hunger or dehydration. They think that yoga exercises may have caused Jani’s body to undergo a biological transformation. The researchers said tests found that his brain is equivalent to that of a 25-year-old.

In fact, according to the Daily Mail, the doctors said that after fasting for two weeks, Jani was healthier than the average 40-year-old.

When a person fasts, there are usually changes in metabolism, but that was not observed in Jani.